Harrison ogborn



H. OGBORN. 'WINNOWING SCREEN.

Patented June 11, 1867.

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Lam-3 Patent m. 65,765, datecl June 11, 1867.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, HARRISON OGBORN, of Richmond, in the county ofWayne, and State of Indiana, have invented a new and useful improvementin Screens for Cleaning Grain, especially from oats and I do herebydeclare the following to be a full and exact description of the same,suflicicnt to enable others skilled in the art to which my inventionappertains to understand and use the same, reference being had to theaccompanying drawings, making part of this specification, in which-Figure 1 is a side elevation of my improved screen.

Figure 2 is a rear elevation, and

Figure 3 a plan of the same.

Similar letters of reference indicate corresponding parts in the severalfigures.

The nature of my invention consists, first, in novel means of givingdirection to the blast of the fan, so as to strike the oats as they fallthrough the screens at such an angle as to change the direction of theirfall from a vertical to an inclined plane; and, secondly, in a novelcombination of an adjustable hopper, fan, and screens, with deliveryspouts and mechanism for imparting reciprocating motion to the screens.

A, in the drawings, may represent the cross-frame of my improved screen,consisting of two frames, placed ,at right angles with anrljointed toeach other, held at the bottom by cross-pieces, and at the lower edgeoftheir joint by a triangular piece. The longer pieces of the frame Ahave at their top ends exsections, in the angle of which rests thehopper N, secured to the frame. At the bottom of the rear side of thehopper are holes, which are opened or closed, to allow the grain to fallthrough, by means of a slide, 0, moving inslots in the frame A, andoperated by means of the lcv 'er T, pivoted to the hopper at the centreof the rear side. Suspended by the rods M from the rear upper ends ofthe frame A, and under the hopper N, are the screens L, consisting oftwo frames, each provided at its top and bottom side with a screen, K,so as to make the grain as it falls through the frame L pass throughfour separate screens, and a space between each two of them. Attached tothe sides of the lower screen-frame L are plates I, the lower ends ofwhich are again attached to the inclined screenframe H, provided zitboth its top and bottom'with a screen and suspended at its-forward endto the shorter frame A by means of rods M. Between this screen-frame andthe lower forward end of the screen frame L is situated the mouth of thefan-box D. Attached to the sides of this fan-box D are plates E, holdingplates F, the outer edges of which are semicircular, and are notched attheir top and bottom. The blast-guides F, con- .sisting of metal platesof a width equal to that of the plates F, are pivoted at their lowerforward ends in the plates E, and have pins or rods G attached to them,which are placed in the notches of the plates F, and thus place theMast-guides F' at difl'crent angles to the screen-frames L, in such amanner that an upward, down.- wnrd, or horizon'tal direction may begiven to the blast of air created by the fan. The pinion G is situatedon the end of the fan-shaft, and gears with the toothed wheel B, whichmay be rotated by the handle. Pivoted cccentrically to the pinion C isthe rorl'I, the other end of which is connected to the L-shaped lever R,rovided with two holes on each arm to admit of adjusting thereciprocating motion of the screen-frame H, to which the vertical arm ofthe lever R is attached by means of the rod S The screen-frame Hisprovided with two spouts, one, P, at the forward end of the frame toreceive and conduct to one side all that passes over the upper screenand the other, Q, attached to ucross-piece, h, on the under side of theframe H, and to which the lower screen is fastened for the same purpose.7

The principal object of my invention is to produce a machine which willclean graimespeoially spring wheat, from chess, cockle, dirt, andprincipally oats, and will separate the best and heaviest grain for seedfrom the lighter. Hcretoforc it has been difiicult to clean wheat fromoats, as the grains .of the latter, beingof a long and pointed shape,are apt to fall right through the upper screens on to'the lower ones,and roll over the latter with the wheat into the spouts. But by myimprovement this is f obviated The wheat is poured into the hopper N,and falls .th'rough the graduated holes on to the screens L, which havea rapid reciprocating motion. All the larger chess, cockle, and dirt areretained on the screen, and gradually works backward overthe edge of thescreen-frame. The finer impurities pass through the other screens, andare caught and shaken off the some. With these the catsfall.through,.point downward, in ayertical position. were the blast fromthe fan a direct horizontal one, the position of the grains of catswould not be changed, and they would fall through the meshes of thesereens but by placing-the blast-guides F at an angle of forty-fivedegrees the blast strikes the grain of oats obliquely, capsizing it, andthrowing it flat on to the screen, from which it is carried with thechess, cockle, &c., out backward between the screens by the combinedaction of. the current of air and the shaking motion of the screens,whilst the round and heavy grains of wheat are not afiected by theblast, and fall through the meshes of the screens L on to the lowerinclined screens H, the upper one of which is a little coarser than thelower one. Only the largest, best, and heaviest grains of wheat are fitand used for seeding'purpos'es. As the wheat passes 'over the upperscreen H all the smaller grains, together with what finer impurities maystill be with them, fall through the same on to the lower screen H,leaving on the upper one only the largest, best, and purest wheat forseeding purposes, which is shaken down to the spout P, and carried oil"to one side of the machine, while the smaller wheat of second quality,being cleansed from any still remaining impurities on the lower screenH, moves towards and into the lower spout Q, and is carried ofi to theopposite side of the machine. Thus I am enabled to completely clean thewheat from oats and dirt, and to separate that which is to be used forseed from the smaller grain of second quality;

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is I 1. The apparatus for giving anupward direction to the fan-blast, consisting of the pivotedguide-plates F, provided with rods 6-, in combination with the notchedplates F, substantially as described and for the purposes specified 2.The guide-plates F and notched plates F, in comuinationwith the screensL and H, substantially as I and for the purposes setforth.

3. The L-shaped lever R, rods I and S, pinion C on the fan-shaft, a.ndgear-wheel B, in combination with the screens L and H, arrangedsubstantially as described.

4. In combination with the above, the adjustable slide 0 and pivotedlever T, substantially as and for the purposes set forth.

, HARRISON OGBORN. Witnesses:

ALEX. A. C. KLAUCKE, JOHN A. Wmnsnsnsm.

